yian, depending on what type of immoblisation ur car has.(eg. single point immob, or mutilple. fuel pump, ign cut, crank wire cut etc.)will effect the installation, and what has to be done.
All they usually do is put in an additional relay to switch on the immob once the turbo timer has turned off.
Someone at Autobarn can do this. The guy at the Doncaster one is pretty good, and it will most likely be cheaper than paying an auto elec and hourly rate to fit it.